78911353222123 has 2 divisors, whose sum is σ = 78911353222124. Its totient is φ = 78911353222122.

The previous prime is 78911353222109. The next prime is 78911353222129. The reversal of 78911353222123 is 32122235311987.

It is a strong prime.

It is an emirp because it is prime and its reverse (32122235311987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78911353222123 - 2⁹ = 78911353221611 is a prime.

It is not a weakly prime, because it can be changed into another prime (78911353222129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39455676611061 + 39455676611062.

It is an arithmetic number, because the mean of its divisors is an integer number (39455676611062).

Almost surely, 2^{78911353222123} is an apocalyptic number.

78911353222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

78911353222123 is an equidigital number, since it uses as much as digits as its factorization.

78911353222123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The spelling of 78911353222123 in words is "seventy-eight trillion, nine hundred eleven billion, three hundred fifty-three million, two hundred twenty-two thousand, one hundred twenty-three".